Set your servo for 900, -900 and a short delay. But you'll need to use the photogrammetry function, not the scan to trigger the camera. just before you upload you should see the action in meters. Unfortunately, if you're also using a Zen with that Nex7 (like we are), you'll get usually two exposure for each action point. A pain. Almost as much as the fact the iOSD won't record time stamps for syncing the photo's gps data! Arrrrg! Still using a data logger.
Could you let us know if your using an F-channel for this? I have tired every which way but can't get this to work, F2 (r) I can control via F-channel keys if activated but can't via the photo tool or trigger (even with F-channel control unchecked for F2), cant make heads nor tails of this. Transparently these triggers are logged via IOSD but I cant see this either, confused!